Electric lamp.



A. G. HOBAN & Ra L. MARQUIS.

' ELECTRIC LAMP. IAPPLIUATION TILED DEO.10, 1912.

l,?4@,949..- Patented Oct. 7, 1913.

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t ltllTEll I ll hillllll l lf @Fl lllldn ALBERT G. HOBAN w lhl'll RALPHI. MARQUIS, OF DAYTON, QHIG.

ELECTRIC LAMP.

Specification of Letters Patent.

Patented @ctfi, 1913 Application filed December 10, 1912. Serial No.735,927.

To all whom it may concern:

Be it known that we, AIMER'L G. HOBAN and RALPH/L. IVlARQUIS, citizensof the United States, residing at Dayton, in the county of Montgomeryand State of Ohio have invented certain new and useful lin- .provementsin Electric Lamps, of which ed to the deterioratin influence of waterand other elements.

A further object of the invention is to provide for the lamp bulb, areflecting shield so constructed and equipped as to vary at will thecolor of the light emitted.

Other important and incidental objects will he brought out in thefollowing specifi cation and subjoined claims.

In the accompanying drawings, Figure l is a sectional elevation of anincandescent electric lamp provided with our improved protecting andreflecting means. And Fig. 2 is a top plan View of the same.

Throughout the specification and drawings, similar reference charactersdenote corresponding parts. i

In the detailed description of our invention, 1 designates a cup-shapedreceptacle adapted to receive a lamp socket 2. Passing through the baseof the receptacle '1, and entering the lamp socket 2, are leading-inWires 3 and 4 which supply the lamp with current. Extending around theupper por-- tion of the receptacle 1 is an annular flange 5, and betweenthe latter and the top of the receptacle is a threaded portion 7 whichpermits the ,said receptacle to be screwed into an aperture in. asupporting plate This plate 6 is usually the panel of an electric sign,and in order that it may have sufficient strength and rigidityforthatpurpose it is preferably ponstructed of galvan i'zcd iron.

The receptacle 1 is screwed into the plate 6 until the flange 5 bearstightly against the bottom surface of said plate. When so positioned inthe plate 6, the threaded portion 7 of the receptacle 1 will extend ashort distance above said plate. The receptacle is now ready to receivean incandescent lamp 8 having a neck portion 9 which is adapted to bescrewed into a socket 2 from the opposite side of, the plate 6.

Adapted to be fitted over the lamp 8 is a conical shield or cap 10,which may be constructed of Iporcelain or othcrmaterial which will givetie necessary protecting and reflecting properties. The shield 10 isinternallyscrew-threaded at its end of smallest diameter in order thatit may be received by the threaded portion 7 of the receptacle 1 aftersaid threaded portion has passed through the plate 6. After thereceptacle 1 is in place on said plate andthe shield 10. is unitedthereto, these elements form ia Water and weather proof covering for thesocket 2, and there is no possibihtyof wa for or other foreign matterseepin through the points of connection of the siield, receptacle andplate. l lccordin ly, the-damage and injury due to rust an otherchemical decoinposition when an electric sign is exposed to the weather,is avoided in so far as the lamp and its terminals are concerned.

Near its end of largest diameter and-projecting from the inner surfaceof the shield 10, is'an annular flange or ledge 11 upon which is adaptedto rest acircular colored glass 12. This glass is removable to makeplace for a similar glass of another color, and is held in place bysplit ring 13having upwardly projecting ends l ladapted to be grasped bythe fingers. The tension of the ring 13 is sullicient to force ittightly into an annular recess 15 in the shield 10 imn'iediately abovethe glass 12, to hold the latter firmly in place on the ledgell, lt willnow be seen; that the light emitted by the lamp 8 will be directedoutwardly" by the side walls of the shield 10, and colored as passesthrough the glass 12. It is thus sihle to color a character'which a lamp6 may assist in forming in an electric'sign.

lln operation, the receptacle 1 isscreW-ed 19c;

into an aperture in the plat/e76 untilthef' flange 5 bears tightlyagainst the lower sills face of said plate. ;An incandescent lamp 8-. isthen screwed into the socket 2 within the receptacle 1, and the shield10 tightly 10 5 screwed onto the threaded portion 0 said receptacle. Thereceptacle and shield will now cooperate to protect the socketand lampfrom. the deteriorating influence of the weather. A colored glass is nowplaced against the ledge 11, and held in place by the ring 13, to.colorthe light emitted by the lamp.

We do not Wish to be limited to the details of construction herein shownand described,

and any alterations or modifications may be,

made therein to suit difierent conditions oi.

use.

Having described our invention, We claim:

1. In an electric sign, an electric lamp socket, an electric lamp, areceptacle for said socket, a conical shield adapted to be screwed uponthe upper end of said receptacle to surround said lamp, an annular ledgeprojecting from the interior surface of said shield near its outer end,a colored glass resting upon said ledge to color the light emitted bythe lamp, and a split ring 'the outer circumferential portion of whichrests within an annular recess in the shield and the innercircumferential portion of which'bears upon the glass to hold the latterfirmly upon the ledge, substantially as described.

2. In an electric sign, an electric lamp, an

electric lamp socket, a receptacle in which said. socket is inclosed, asupporting plate, an aperture in said plate to receive the receptacle,an annular flange projecting from the upper, outer surface of saidreceptacle and adapted to bear against the plate, said receptacle havinga circumferential threaded portion above said flange, said threadedportion extending beyond the plate When the flange is in contact withit, a conical shield surrounding said lamp, said shield having its endof smallest diameter threaded to receive the threaded portion of saidreceptacle, and a removable colored glass disposed in the outer end ofsaid shield to color the light emitted by the lamp, substantially asdescribed.

In testimony whereof we have hereunto set our hands this 7th day ofDecember A. D. 1912.

' ALBERT G. HOBAN.

RALPH L. MARQUIS. Witnesses:

GEORGE H. SNYDER, HOWARD S. SM1TH..

